Chimney-top or ventilator.



W. NUTTALL.

nun 1 W9 3 |.l NY EA VM D Orr. L H N Yw M N C m H Patented Apr. 25, 1916.

2 SHEETS-SHEET I.

W. NUTTALL.

CHIMNEY TOP 0R VENTILATOR.

APPLICATION FILED MAY 13, 1913.

Patented Apr. 25, 1916.

2 SHEETS-SHEET 2.

THE COLUMBIA PLANOGRAPH C0,, WASHINGTON, n. c.

EMT UFFIFIE.

CHIMNEY-TOP OR VENTILATOR.

Specification of Letters Patent.

Patented Apr. 25, 19115.

Application filed May 13, 1913. Serial No. 767,272.

To all whom it may concern:

Be it known that I, WILLIAM NU'r'rALL, a subject of the King of Great Britain, and resident of 82 Walshaw road, Elton, Bury, in the county of Lancaster, England, have invented a certain new and useful Improvement in Chimney-Tops or Ventilators, of which the following description, having reference to the accompanying sheets of drawings, is a specification.

My invention relates to chimney tops or ventilators of the kind in which the chimney or ventilating shaft is covered by a hood, while passages or channels are arranged to induce the ascending gases to pass out below said hood. These draft inducing passages have heretofore been arranged horizontally but have intersected or extended over the uptake or chimney thus deflecting the stream of rising gases at this part.

My present invention consists in an improved arrangement of these draft-inducing channels whereby they do not intersect or pass across the uptake but leave the latter entirely free so that the ascending gases do not encounter any deflecting devices until they reach the interior walls of the hood. The said channels may be arranged either all in one horizontal plane or in two or more horizontal planes, in which latter cases they are entirely independent of each other, whereas in the former case the corner parts thereof are common to two adjacent channels.

In the accompanying sheets of drawings:-Figure 1 is an elevation, partly in section, of a ventilator or chimney top constructed in accordance with my said invention. Fig. 2 is a sectional plan on line AB of parts illustrated by Fig. 1. Fig. 3 is a similar view to Fig. 1 but shows the ventilating passages arranged all in one plane. Fig. 4: is a sectional plan of Fig. 3 on line (1-1). Fig. 5 is also a similar view to Fig. 1 and shows four uptakes or shafts leading into one ventilator. Fig. 6 is a sectional plan on line E-F of parts shown by Fig. 5. Fig. 7 is a perspective view of the structure illustrated in Fig. 1.

Similar letters and figures of reference indicate like parts throughout the several views.

a indicates the lower portion of my improved ventilator which may be fixed upon a chimney or ventilating shaft or on the roof of any building. Sections a a are superposed upon the base part a but if desired, these parts a, a a may be formed all in one piece. The casing a surrounds a main draft passage, the walls of which extend higher than the upper edge of the part a. Upon this casing a I place a hood 0. This hood 0 may be square, circular or other suitable shape in end elevation, and preferably is of the same shape as the uptake a, a a and casing a which may all be of any appropriate shape in cross section. Within the casing or box a I form passages 6, b and 5 these passages may be arranged all in one plane as shown by Fig. 3, or they may be arranged in two (or more) planes as shown in Fig. 1. In the latter figure the channels arranged in one plane are at right angles to those at another level, but in every case these channels are arranged to surround or be tangential to the main draft passage a so that they do not in any way intersect or pass across said passage or and consequently cannot interfere with any smoke or gases rising within such uptake, thus said gases or smoke, if not otherwise acted upon, would rise into contact with the interior of the hood 0.

In the upper surfaces of the channels 6, b 6 and b I arrange openings cl. These openings are to allow smoke or gases to pass from the interior of the casing of or hood 0 within and through the draft-inducing channels b, 72 b or b and so into the surrounding atmosphere. Cross pieces h are preferably arranged at the entrance of these air inducing channels so as to split up somewhat the currents of air entering therein, and also prevent the ingress of birds, etc., to the ventilator. I may mount deflecting plates 7 in connection with the openings d so as to guide the smoke or ascending gases into the draft-inducing channels 79, Z2 b or b as will be well understood.

Figs. 1, 2, 3 and 4 show the ventilator fixed to a single uptake, while Figs. 5 and 6 show one ventilator acting in conjunction with four shafts or uptakes g.

The lower part of the portion a may be surrounded by a conical part a and any water of condensation passing down the interior walls of the sections a or a is caught between the upper end of the part a and the lower portion of the part a and the upper end of the section a and the lower portion from the uptake of. g

cal passages termlnating 1n openings comor ventilating currents of outside affect the gases or smoke ascending the uping an uptake, [main draft passage inclosmg the upper end of the section of, while to allow such water to escape openings 76 are arranged as shown by the drawings. 7 A

It will be seen that the actions of my im proved ventilator or chimney top are such that in whatever direction the wind may be blowing currents will pass through one or other of the'channels 72, b 6 or 6 thus inducing smoke or ascending gases to pass through the respective opening or openings -d and be distributed into the surrounding atmosphere, while none of these inducing air can take a because. they are entirely independent thereof and do not either allow the draftu inducing air to enter direct into the ventilator neither do they impede the ascending of said smoke or gases for the reason that they are simply tangential to and separate My improved ventilator may be formed of metal, earthenware, timber or other ap propriate material,"as may be desired.

Such being the nature and object of my invention, what I claim is 1. A chimney top or ventilator, comprising an uptake, a box or casing lnclosing the upper end thereof, a closed hood on the top of said box or-casing, said box or casing zontally extending draft inducing passages surrounding the upper end of said uptake below the discharge end thereof, said horizontal passages communicating with vertimunicating with the interior of said box or casing at points at one side of the main draft passage through said casing.

2. A chimney top or ventilator, comprisa box or easing having a of said uptake and in communication there- .with, said box or casing having a conical vided with a portion inclosing the upper end of the uptake, a closed hood on the top of said box or casing, said box or casing being proplurality of horizontally extending draft inducing passages surrounding said main draft passage below the discharge end thereof, said horizontal passages communicating with vertical passages terminating in openings communicating with the interior of said box or casing at points at one side of the main draft passage through said casing, and means for permitting condensation to escape from the interior of said uptake, the end of each section proj ecting' into and spaced from the wall of the next adjoining section to form troughs to collect condensation, said wall having openings to permit the outlet of said condensation.

3. A chimney top or ventilator, comprising a sectional uptake, a box or casing inclosing the upper end thereof, and having a main draft passage coinciding with said uptake, a closed hood on the top of said box or casing, said box or casing being provided with a plurality of horizontally extending draft inducing passages surrounding said main draft passage below the discharge end thereof, said horizontal passages communicating with vertical passages terminating in openings communicating with the interior of said box or casing at points copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, 110. 

